Valve-operating mechanism



Patented June 25, 1929. l l UNITED STATES FATE ()F'F'I CE.

Application filed May 18, 1927. Serial No. 192,467.

My invention relates to Valve operating the cylinder easing by the bolts23,- which mecha i m, end plate serves to hold the springs 21 with It isthe object of my invention to provide their supporting ring 24 inposition. At the a valve operating mechanism in which the same time thesprings do not impede the 60 reciprocation of the piston rod Will resultrotation of this cylindrical valve member in the proper positioning'o'fvalve mechahut permit its free rotation by the gear 18. nism. The gear18 is loosely mounted upon a It is the object of my invention to provideshaft 25, which reciprocates. This shaft is positive means forcontrolling the contents provided with a cam groove26, in which a 6') ofa cylinder through suitable valves, decam linger 27 of the gear 18 islocated. As pendent upon the position of the piston in the gear is heldfrom reciprocation by the th gr linden end member 22 and the cylindercasing, the Referring to the drawings: reciprocation of the shaft 25will result in Figure 1 is a section through a cylinder the rotation ofthe gear 18. 7o valve and operating mechanism of my This reciprocationof the shaft is j ti brought about in the following manner: Figure 2 isa section on the line 22 of A cross arm 28 is clamped upon the pistonFigure 1, looking in the direction of the rod. 1. It extends adjacent totheshaft an-OWS between the abut-merits 29 and clamped 29 Fi 3 i an l ti1 th ari g onthat shaft. lVhen the piston and piston a d l fta d valv mhanism show in rod are nearing the end of their stroke and Figure 1, thepoint of view being that on it becomes desirable to cut oil" any furtherthe line 33 of Figure 1, looking in the flow of fluid or gas by reasonof the piston di ti f th arr w movement, then the arm 28 engages one ofFi 4 i a ti thr h th valve the stops 29 or 30 moving the shaft 25 in hft d Valve gear. one direction, and in doing so the gear 18 Fi 5 i d til id l ti f th is rotated which rotates the valve member valveoperating cam shaft, showing the cam 10 or the valve member 11, as thecase may gmove be, closing one O'ffillllfi valve members ports 65 30Referring to the drawings in detail, 1 is a and opening the other.

piston rod carrying a piston 2, operating in it will he understood thatthe passageway cylinder 8. The cylinder Sis carried within 5 is leotodto one exit line, dcs ated 31, a jacket having a wall 4i and apassageway While the passageway 12 connected to an in the wall,designated 5. This passageway inlet line 82. will be understood that the35 con'iinunicates at either end with ports 6 and ines 31 and 32 may beused either for inlet 7, which are adapted to register with ports orexit purposes. 8 and 9 respectively, in rotary valve memhers 10 and 11.

A similar passageway 12 is provided on The numeral 81 represents theoutlet port i the other side of the cylinder, having ports While 32represents the intake port. Inthe 13 and 1d registering with ports 15and 16 position shown in Figure 1 the piston 2 is of the valve members11 and 10 respectively. in the act of moving toward the lefthand Thesevalve members consist of a cylindrical end of the cylinder with thevalves 6-8 and body having an external gear 17 meshing 13 15 open, whilethe valves 79 an l1 45 with a valve gear 18. The cylindrical body 16 areclosed.

is tapered as at 19 to fit against the tapered In this position thefluid is being forced shoulders of the cylinder casing. An interoutthrough valve G8 while it is being nally extending flange 20 is providedfor taken in through the valve 1315. positioning the cylindrical memberand reen- When the piston reaches the extreme leftforcing it. The inwardextending member hand limit of its motion the arm 28 will en- 20 furtherserves as an abutment against gage with the stop 29 to cause therotation which the spring fingers 21 press to main of the gear 18 withthe consequent rotation tain the tapered surface 19 in engagement of thevalve members 10 and 11. After the with the tapered surface of thecylinder Valve members 10 and 11 are rotated thus 5 casing. the valves6-8 and 13-15 are closed and An end plate 22 is provided fastened tovthe valves 79 and 1416 are opened.

Method 0; operation.

32 through the valve 1315 into the right-- hand end of the cylinder,while the liquid in the lefthand end of the cylinder is being forced outthrough valve G8 and the port 31.

Thus I have provided a suitable Valve control mechanism, adaptableeither to a single or double action pump or compressor, which willpositively cut off the flow of fluid at a predetermined point in thestroke of the pump.

It will be understood that I desire to comprehend within my inventionsuch modifications as will adapt it to varying condi- I tions and uses,

I-Iaving thus'fully described my invention, what I claim as new anddesire to secure by Letters Patent, is:

1. In combination, a cylinder, a piston and piston rod, an inlet pipeand exit pipe, a valve member adapted to control the passage of fluidthrough said pipes, said valve member having a tapered body with portstherein for alternately registering with said pipes, yielding means tomaintain said tapere'd body in engagement with the tapered seat in saidcylinder and the tapered faces of said pipes, a fragmentary gear on saidvalve member, a head on said cylinder inclosing said valve member andmaintaining said yielding member in position, a supplementary gearengaging with said fragmentary gear, a cam shaft having a cam groove, acam pin on said supplementary gear engaging in the groove, space stopson said cam shaft and an arm on said piston rod extending to a pointadjacent said stops to alternately engage them to reciprocate said camshaft, whereby said valve member is rotated for the alternate openingand closing of said exit and inlet pipes.

2. In combination, a cylinder, a piston and piston rod, an inlet pipeand exit pipe,

a valve member adapted to control the passage of fluid through saidpipes, said valve member having a tapered body with ports therein foralternately registeringvwith said pipes, yielding means to maintain saidtapered body in engagement with the tapered seat in said cylinder andthe tapered faces of said pipes, a fragmentary gear on said valvemember, a head on said cylinder in closing said valve member andmaintaining said yielding member in position, a supplementary gearengaging with said fragmentary gear, a cam shaft having a cam groove, acam pin on said supplementary gear engaging in the groove, space stopson said cam shaft, an arm on said piston rod extending to a pointadjacent said stops to alternately engage them to reciprocate said camshaft, whereby said valve member is rotated for the alternate openingand closing of said exit and inlet pipes, means of connecting said pipesto the other end of said cylinder and a second valve member, yieldingseating means, cylinder head and supplementary gear mounted on said camshaft whereby when one end of the cylinder is connected to the eXitlinethe other end of the cylinder will be closed and connected to the inletline.

3. In combination, a cylinder casing having inlet and exit passagewaysconnected to inlet and exit lines, a cylinder, rotatable valve membershaving ports for controlling the communication with said passagewayswith respective ends of said cylinder so arranged that when one end ofthe cylinder is connected to the exit passageway the other end of thecylinder is connected to the inlet pas sageway, a piston and piston rod,means operated by said piston rod for controlling the operation of saidvalve members for opening and closing said ports, said means consistingof gearing on said valve members, cam gears engaging therewith, a commoncam shaft supporting said gears, cam members on said gears, cam groovesand said cam shaft engaging therewith and space stops on said cam shaftfor engaging an arm extending from said piston rod adjacent thereto foralternate engagement therewith and an arm on said piston rod.

In testimony whereof, I affix my signature.

MOFFAT EDWARDS.

